It can be done very easily.
There are many scopes made of sections (from square to octagonal). That would be a terrific product as long as the Balsa is strong enough to take the Mirror & Mirror Cell.
Focuser wouldn't be a problem but the balsa may have to be reinforced around heavier accessories like Telrads, piggy backed scopes etc.
Great Idea Andrew. Nice and light. OTA Probably wouldn't dew up much either!!
Better tell us where to buy this product in case someone wants to make an OTA out of it. Thanks!